The effectiveness of manual and exercise therapy on headache intensity and frequency among patients with cervicogenic headache: a systematic review and meta-analysis.

Researchers pooled data from twenty randomized controlled trials involving 1,439 patients to see whether manual therapy (like spinal manipulation and trigger point work) or exercise programs actually help people with cervicogenic headache, which is a headache that originates from problems in the neck. When they combined results from six well-designed studies that compared manual therapy to sham treatments, they found moderate-to-large improvements in headache frequency and intensity in the short term, with smaller but still meaningful gains persisting over longer follow-up periods. However, most of the studies they reviewed had quality concerns, which is why the researchers were cautious about how confident we should be.

When they looked only at the highest-quality studies, the effects became smaller but were still in favour of manual therapy, particularly spinal manipulation. The overall message is that manual therapy and exercise may help reduce cervicogenic headache, but we need better-designed trials before making stronger claims.

Researchers looked at 20 studies involving over 1,400 people with cervicogenic headache, which is pain that comes from problems in the neck rather than inside the head itself. When they examined the highest-quality studies comparing manual therapy techniques like spinal manipulation to fake treatments, they found that people receiving real manual therapy did tend to experience fewer and less intense headaches, particularly in the weeks and months right after treatment.

The improvements were smaller when researchers looked only at the best-designed studies, but the pattern still favored manual therapy over sham treatments. The picture is less clear when comparing manual therapy to exercise programs or other active treatments, because there were fewer well-designed studies of those comparisons.

This research suggests that manual therapy approaches may help some people with cervicogenic headache, though individual responses likely vary and more research is needed to understand who benefits most.

This is a summary of research, not medical advice. Talk to your own healthcare provider about anything affecting your care.

This systematic review examined 20 RCTs and pooled data from six high-quality trials using sham comparators. Meta-analysis showed moderate-to-large short-term effects on headache frequency and intensity, with smaller long-term effects.

When the authors restricted analysis to low-risk-of-bias trials (n=2, both spinal manipulation), effect sizes contracted to small-to-moderate for short-term and small for long-term outcomes, suggesting that effect sizes in the broader literature may reflect bias rather than true clinical differences. GRADE assessment yielded moderate-quality evidence.

The heterogeneity in interventions and comparators limited meta-analysis capacity for exercise therapy and for direct manual versus exercise comparisons, which represents a significant evidence gap given guidelines emphasizing the need for head-to-head trials. Most included trials carried high risk of bias, reinforcing the authors' call for future work that adheres to strict methodological standards and facilitates cross-study comparison.